US48160A - Improved mold for making corundum-wheels - Google Patents

Description

E. H. DANFORTH.

MODE FOR MAKING GORUNDUM WHEELS. v

[ N 0. Patented June 13, 1865.

l was co. FNOTO LITNO WASHINGTON n c UNITED STATES PATENT OFFI E.

ELIJAH E'DANFQRT-H, or JAMESTOWN, NEW YORK.

IMPROVED MOLDFORMAKING co uNnuM-w EEL-s.

V Specification forming part of Letters Patent No.'4'8,160, dated June 13, 1865.

To all whom it may concern;

Be it known that I, ELIJAH EDANFOBTH, of slamestowmin the county of Chautauqua and State. of New York, have invented a new and useful machine for renewing corundumwheels used by dentists for grinding teeth when the surface has become imperfect, which I term a (lorundum-Pressfl and I do hereby declare-that the following is a full, ,clear, and exact'description of the construction and op-v eration of the same,reference being bad to the a'nnexeddrawings, makinga part of this specification, in which- Figure l' is a perspective view. Fig. 2 is a bed-with a. screw-posti t-heeengter, Fig.3 is

curb; Fig. 4, a follower; Fig. 5, a nut.

Fig. A, the bed, is round, four inches inidi ameter' and one-half, of an inch thick, with the upper surface turned perfectly level' and thoroughly polished,=in the center of'which stands a screw-post twoand one-halt inches high and one-fourth of an inch thick.

Fig. B, the curb, is round, three inches in diameter, one and one-half of an inchin height,

and one-fourth of an inch thick. The inner surface is turned and thoroughly polished.

The edges are alsoturned, so asto make a per- .fect joint w'henset on the bed.

Fig. 0, the follower,'i,s of suflicient diameter to-fill the curb perfectly, one-fourth of an inch thick, or thicker, at the edge, so as to insure its passage evenly through the curb. It may also be thickened in the center, so that it may be steadied by the. -'screw;- post, which passes through the center of it. Its lower surface is turnedlevel andthoroughly polished. 'In its center is a' hole one-fourth of an inch in diameter, corresponding perfectly with the diameter of the screw-post, drilled at right angles with the polished-surface Fig. D, the nut, isone and one-half an-inch in diameter and one-half aninch thick, with a branch rising from eachside, so as to beconveniently'operated with the thumb and finger.

' screw-post.

It contains a female screw, running through it at right angles with the lower turned surface,

corresponding perfectly with the threa dof the The capacity of the press to receive or make large and small wheels maybe-produced by making it'large or small as awhole, orbymaking a pluralityof curbsand followers of different sizes.

The press is made of cast-iron, except the screw-post, which ismade of steel. 7

Mode of using it: If you wish to make a new wheel, mix gum-shellac and corundum in a common glue-pot. Oil the polished surfaces of the press, rubbing oi the surplus oil. Then place the curb onthe bed. Put into it a sufficient quantityof the mixture to make a wheel 'of the desired thickness. Adjust the follower in its place. the compound has time tocool butif it should get so cold as to prevent its being pressed into a perfect wheel, place the press in an oven or. on a stove, where it will heat gradually, lilll you will require a thin cloth holder to handle it. Then screw it down firmly and cast the press into cold water a few moments, when it will be ready to take apart. If you wish to renew an old wheel, inclose it in the press, heat, screw down, and cool as above. If you wish to make a new wheel of old ones or ofbroken ones, put them in equally around the screwpost. Then proceed as described above. Be-

fore using the wheels washthem' in strong soap-suds.

What I claim as my invention, and desire to secure by Letters Patent, is

Not the base-A or the curb B, or any other part herein described, but their combination, as set forth and described, and represented in Fig. 1, a perspective view.

ELIJAH H. DANFORTH.

Witnesses:

ED. 3. BOOTEY, JOHN J. KINNEY.

Put on thenut and run it down before-

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